143871 Geraldine Brady - (Studies in the History and Philosophy of Mathematics)From Peirce to Skolem: A neglected chapter in the history of logic (2000, North Holland) ISBN10:044450334X(475s) 124a6b4764e83c064f228272ec9cc0c7.djvu

143939 William Bragg Ewald - From Kant to Hilbert: A source book in the foundations of mathematics Vol. 1 (2007, Oxford University Press, USA) ISBN10:0198505353(695s) 169dcc79e1083329ce23cbd7f167059a.djvu